After a bit of searching, I've been unable to find reliable step-by-step instructions when it comes to using ADEU cards in conjunction with ADC cards for automatic DME updating. Which cards are loaded first, and does the ADC card need to be reloaded when changing ADEU cards? I'm using a CS 707 with only one INS unit, so multi-console procedures won't work for me.

The short answer is no, you only need to load the *.adc card once along with the first *.awc(waypoint) card. As soon as the respective VOR/DME comes within range do the update on your CDU. It's as simple as that. The correct procedure is properly explained in the CIVA manuel and is the reliable step by step instruction you have been searching for!!!!!vololiberista

So, say I'm flying a flight with 2 sets of waypoint cards. I should load the first AWC, followed by the ADC. When I'm on the final leg of that card, I should switch to the second AWC card, but don't need to load the ADC card again. Is that correct?